课程名称︰植物营养学 课程性质︰系必修 课程教师︰锺仁赐 开课学院：生农学院 开课系所︰农业化学系 考试日期（年月日）︰2011.4.28 考试时限（分钟）：120分钟 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1.It is said "corruption is the mother of vegetation". Why? (5 points) 2.Why does "agricultural chemistry" play an important in the search for the "principle" of vegetation? (5 points) 3.Explain the following terms: (20 points) (1)active transport (2)growth (3)antiport (4)apoplast (5)aquaporins (6)allelopathy (7)determinate plants (8)electrogenic (9)proteoid roots (10)ion pump 4.Photosynthesis in higher plants is said to involve two distinct photosystems. Describe the two photosystems. (10 points) 5.According to Arnon and Stout (1939), what criteria must be met for an element to be described as essential? (10 points) 6.Crop yields have been increasing over the years because of improvements in tillage, varieties, pest control, fertilization, and so on. From a theoretical standpoint, what do you consider to be the factor that will ultimately limit further increases in plant growth? From a practical standpoint, what do you think this factor will be? (10 points) 7.Name and briefly describe the two pH stats that contribute to the maintenance of a high pH level in cytosol of plants. Which one is dominant and why? (10 points) 8.What are the physiological functions that are highly regulated by the plasmalemma H+-ATPase? (10 points) 9.What is photorespiration? Discuss the meaning and significance of photorespiration of C3 plants. (10 plants) 10.Discuss: why does nitrate uptake of plant increase the pH of the outer solution and the reverse is true for ammonium uptake? (10 points) --

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